TY - JOUR AU - I. N. Blinov TI - A certain class of improper systems JO - Differencialʹnye uravneniâ PY - 1968 SP - 949 EP - 951 VL - 4 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1968_4_5_a21/ LA - ru ID - DE_1968_4_5_a21 ER -